Does The Spam Ever Stop?

random_nerd

New Member
Sep 30, 2025
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Hi all. I'm new to freeswitch. I have some basic setup in place, including using mod_signalwire, mod_callcenter, routing calls with lua, connecting vagents via secure web sockets, etc. Overall I THINK everything is in a pretty good place...

HOWEVER, when I watch logs roll through in fscli, I see hundreds of malicious invites/sip connection attempts from random ip addresses around the World.

Nothing has gotten through (it's all just brute force/dialplans are set to auto hang up), but it does create quite a bit of clutter... is there some form of best practice out there that would lock things down a bit more?

PS. I considered locking the signaling ports to only allow incoming requests from signalwire servers, however their IP addresses don't seem to be publicly available, and they say they often rotate/check domain instead.

Thank You!
 
One thing you can do that will have a big impact immediately is to change your SIP ports to more obscure numbers. This makes it harder for SIP scanners to access you. You can also block unwanted traffic using tools like SBC, SIP proxy, or Fail2Ban.